• DKAIISrAGE OF JEFFEKSON COUNTY, TEXAS. 



Maximum run-off for Taylors Bayou. 



23 



Point of run-ofl. 



Drainage 

 area. 



Total 



Sj. miles. 



Inches. 



597 



0.27 



459 



.35 



312 



.48 



280 



.55 



120 



.55 



105 



.63 



30 



1.10 



22 



1.60 



At West Port Arthur railroad bridge 



Just below Hillebrant Bayou 



Just above Hillebrant Bayou 



Just below North Fork of Taylors Bayou 

 Just above North Fork of Taylors Bayou 



Just below Mayhaw Bayou ". . . . 



Just above Mayhaw Bayou 



At Hamshire railroad bridge 



Second-feet. 

 4,400 

 4,400 

 4,100 

 4,100 

 1,800 

 1,800 

 1,000 

 945 



The total fall available in the 25 miles from the mouth of Mayhaw 

 Bayou to West Port Arthur is only 4 feet. As indicated on the map, 

 below Hillebrant Bayou there should be 5 cut-offs having a total 

 length of 1.7 miles, and between this bayou and the North Fork of 

 Taylors Bayou there should be 9 cut-offs aggregating 1.5 miles, with 

 bottom width of 85 feet, depth 20 feet, and side slopes 1 to 1. The 

 whole present channel of Taylors Bayou below the North Fork, 

 except the cut-off bends, should be enlarged to the same dimensions. 

 The fall below Hillebrant Bayou should be 0.16 foot per mile, and 

 between that stream and the North Fork about 0.14 foot per mile. 

 With these slopes the elevations of water surface above mean tide 

 level will be 0.0 at West Port Arthur, 1.3 at Hillebrant Bayou, and 

 2.6 at the North Fork. Between the North Fork and Mayhaw Bayou 

 the channel should be 50 feet in bottom width, 17 feet deep, with 1 

 to 1 side slopes and a fall of 0.14 foot per mile. The water surface 

 at Mayhaw Bayou then would have the elevation 3.4. Between 

 this point and the railroad bridge at Hamshire the available fall is 

 0.88 foot per mile, which will give ample capacity to a ditch of 25- 

 foot bottom and 12-foot depth. The channel here recommended 

 wiU prevent overflow at seasons of ordinary range of tide, which is 

 small. However, on rare occasions severe storms will be accompa- 

 nied by high winds that wiU raise the tides sufficient to obliterate 

 the slight fall obtainable on the lower part of the bayou, and at such 

 times short periods of overflow may be expected. 



The excavation required by the improvement recommended is 

 roughly estimated thus: 



Excavation in Taylors Bayou. 



Section. 



Wr-st I'arl Arthur to irillfbrant lisiyoii. 



Iffllohrant iJayou to .Norlh Fork 



Nwth Kwk to .Mayhaw liayou 



.May haw Uayou to Ilantshirp 



Total. 



Distance. 



Excava- 

 tion. 



Mikn. 



Cubic i/(Ii. 



S.O 



2,02r),01)0 



(1.7 



2,1111,000 



(1.0 



-ino.ooo 



r.. 



S2r,,(H)(» 





— 



4,938,000 



